Hash Algorithm from http://www.hellocq.net/forum/simple/?t284938.html

aprs-hash.js

//This algorithm is from http://www.hellocq.net/forum/simple/?t284938.html
function dohash(theCall){
   var hash=0x73e2; 
   var rootCall=theCall.split("-")[0].toUpperCase();
   for(var i=0;i<rootCall.length;i+=2){
       hash^=rootCall.charCodeAt(i)<<8;
       hash^=rootCall.charCodeAt(i+1);
   }
   return hash & 0x7fff;
}

var theCall=prompt("Enter Your Number","BG6LKT");
var ans=dohash(theCall);
document.write(ans);